Attempting to weld steel with AC is generally inefficient, as it cools the workpiece during the cleaning phase, reducing penetration. While modern inverters offer flexibility, the fundamental physics of the arc remain unchanged, dictating metal behavior, penetration, and overall weld quality.
Choosing Between DC vs AC TIG Welding Current for Your Project
Material-Specific Applications The material being welded is the primary factor in determining the correct current type. A "Clean" setting extends the electrode positive time for maximum oxide removal, while a "Weld" setting extends electrode negative for deeper penetration.
The Welding Stage (DCEN): During the DCEN phase, the heat is transferred to the puddle, allowing for efficient melting of the base metal and filler rod. The current alternates between DCEN and DCEP (Direct Current Electrode Positive), creating a balanced effect that solves the problems inherent in each individual mode.
DC vs AC TIG Welding Current Choice: Understanding the Differences
Equipment Considerations and Technique. Direct Current Electrode Negative (DCEN) Penetration and Cleaning Action DCEN is the most common mode for standard TIG welding of steel and stainless steel.
More About Ac or dc tig welding
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